RT Journal Article SR Electronic T1 Current approaches in chronic pain JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 505 OP 508 DO 10.7861/clinmedicine.2-6-505 VO 2 IS 6 A1 Christopher Bass A1 Tim Jack YR 2002 UL http://www.rcpjournals.org/content/2/6/505.abstract AB